Clutch.



No. 668,675. Patented H6126, lem.

J. CARLSON.

CLUTCH.

(Application filed Nov. 14, 1900.

(No Modal.)

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QN. n: N i Q3 'Ba i WZZrzesses MMM' UNITED lSTATES PATENT OFFICE.

JOHN CARLSON, OF BROOKLYN, NEW YORK.

CLUTCH.

SPECIFICATION forming part of Letters Patent No. 668,675, dated February 26, 1901.

. Application filed November 14., 1900. Serial No. 36.430. (No model.)

To all. whom it may concern.:

Beit known that I, JOHN CARLSON, acitizen of the United States, and a resident of Brooklyn, county of Kings, and State of New York, have invented certain new and useful Improvements in Clutches, of which the following is a specification.

This invention relates to a clutch of simple construction and adapted to quickly and effectively couple a transmission-wheel to a shaft.

In the accompanying drawings, Figure 1 is an end view of my improved clutch; Fig. 2, a section on line 2 2, Fig. 3; Fig. 3, a section on line 3 3, Fig. 2; Fig. 4, a section on line 4 4, Fig. 3, looking down; and Fig. 5, a detail of one of the hub-sections h2.

The letter CL represents a shaft, and b the gear or transmission wheel, which is to be coupled to said shaft or uncoupled therefrom by means of the clutch. This wheel is keyed to or made integral with a hub o, that loosely surrounds shaft a, and is provided with an extension or casing c', havinga circular flange c2, concentric to shaft a. To obtain a better gripping-surface, I prefer to form a second circular flange d upon an annular disk d, secured to the edge of casing c', the flanges c2 d being arranged at equal radial distances from shaft a and facing each other.

Within the casing o' there is keyed to shaft o. a collar e, in which are stepped the inner ends of four (more or less) radially-arranged right-and-left screws f. The outer thread of each screw engages the threaded hub g of an outer jaw g, adapted to engage the outer faces of the iianges c2 d. The inner thread of each screw engages the split and threaded hub h' h2 of an inner jaw h, adapted to engage the inner faces of the flanges c2 d. The edge of hub-section h projects laterally beyond that of the section h2, Fig. et, and is guided within a groove e' of a spider e2, formed integral with collar e. It will be seen that by simultaneously turning the screws fthe jaws g h will either engage or release the flanges c2 d, so that thus the hub c, and consequently the Wheel h, is coupled to or uncoupled from the shaft a.

In order to operate the screws f, I provide a sliding sleeve a', thatelnbraces the shaft a and is guided thereon by a groove and a feather a. A clutch-lever i serves to move this sleeve either toward or away from the collar e. A flange @"2 of sleeve i is provided with as many tapped perforations as there are screws f, and each one of these perforations receives the threaded end of a screw j, carrying a jam-nutj.

The main body of each screw]l is provided with a thread j2, which constitutes a rack or worm that is adapted to engage a wormwheel f', fitted on screwf. The free ends of the worms find a bearingin a perforated flange es of collar e.

The operation of the clutch will be readily understood. When the sleeve e' is moved toward the right, (from the position shown in Fig. 2,) the screws f will be so turned by means of the worms 7'2 and worm-Wheels f that the jaws g h will open and release the flanges c2 d', so that the wheel bis uncoupled. When the sleeve is moved toward the left, the jaws will close upon the flanges and couple the wheel b to the shaft a. In order to adjust the play of the jaws g h or, in other words, to set the clutch to flanges c2 d of different thicknesses, it is only necessary to loosen the nuts j and screw the worms j 3'2 farther into or out of the flange i2. In this way the operative length of each worm will be changed, and thus a different amount of rotation will be imparted to worm-wheels f by the sliding` movement of sleeve t'.

WhatI claim isl. In a clutch, the combination of a shaft with a transmission-wheel, a casing secured to the Wheel, a pair of circular flanges on the casing that face each other, jaws engaging both of said iian ges, rightLand-left screws engaging the jaws, worm-wheels on the screws, Worms engaging the worm-wheels, a sliding sleeve carrying the worms and means for axially adjusting the worms on the sleeve, substantially as specified.

2. In a clutch, the combination of a shaft with a sliding sleeve, longitudinally-adjustable worms having threaded ends tapped into A i f said sleeve, right-and1eft screws having State of New York, this 12th day of Novem- Wheels adapted to be engaged by the worms, bei', 1900. f f f f f jaws carried by the screws, a flanffe adapted 1 to beengaged by the jaws, and a nralsmissionf JOHN CARLSON' 5 Wheel opelatively connected to the Hange, W'itneSses:

ysubstfumally as specified. BENNET J. MALMFELT,

Signed by me at New York city, county andI f yJOHN B. VVETHERBEE. 

